It is a scientific fact that peat moss bog field does have natural preservatives to stop decomposting of bodies and the like. There's something on bog field that keeps everything from decomposing. There are discoveries in Ireland of such archeaologists finding preserved bodies in bog marshes. Here's one example:
irisharchaeology.ie/.../irish-bog-bodies-recent-discoveries
Even National Geographic magazine did an article on Irish bog bodies discovered. I know I read that article a few years back.